<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>ie缓存问题</title>
</head>
<body>
  <button>点击发送请求</button>
  <div id="result"></div>
</body>
<style>
  #result {
    width: 200px;
    height: 100px;
    border: solid 1px #258;
  }
</style>
<script>
  const btn = document.getElementsByTagName('button')[0]
  const result = document.getElementById('result')
  btn.addEventListener('click', function(){
    const xhr = new XMLHttpRequest()
    // 解决ie缓存核心：发送请求时附带时间戳
    xhr.open('GET', 'http://127.0.0.1:8000/ie?t='+Date.now())
    xhr.send()
    xhr.onreadystatechange = function () {
      if(xhr.readyState === 4){
        if(xhr.status >= 200 && xhr.status < 300){
          result.innerHTML = xhr.response
        }
      }
    }
  })
</script>
</html>